Aon launches Sidecar X with $200 million in capacity secured

Aon, a global professional services firm, has announced the launch of Sidecar X, marking the latest evolution in its Sidecar platform connecting insurance capital with complex transactional risk and offering up to $200 million in capacity.

As transaction solutions markets continue to evolve, deals are becoming larger, more complex and increasingly dependent on sophisticated risk transfer solutions and capacity availability. At the same time, insurers and capital are becoming increasingly selective and disciplined amid a rapidly changing environment.

In response, Aon developed Sidecar X to combine insurer capital, proprietary analytics and global market expertise, delivering pre-agreed capacity and more differentiated outcomes for clients across mergers and acquisitions and tax products globally.

“As transaction risks become increasingly complex, our clients need greater clarity and solutions that help them navigate an evolving market,” said Christian Hoffmann, CEO of Commercial Risk at Aon. “Sidecar X demonstrates our commitment to delivering differentiated risk solutions that help clients achieve better outcomes.”

An exclusive offering for Aon clients, Sidecar X is available in regions including the US, Canada, UK, Europe and Asia, across representations and warranties and tax insurance products.

Sidecar X delivers streamlined underwriting and claims processes through pre-negotiated, delegated frameworks, while providing expanded access to dedicated global insurance capacity and meaningful premium savings. For participating insurers and reinsurers, the platform provides a disciplined, analytics-led approach to diversified transactional risk, enabling more informed underwriting decisions and scalable, sustained capital deployment.

Martyn Chattey, Chief Broking Officer for the Americas at Aon, said the launch reflects the company’s commitment to developing market-leading solutions that strengthen connectivity between insurers, reinsurers and clients, while delivering better outcomes across the transaction solutions insurance ecosystem.

“By combining Aon’s proprietary data, analytics and global market expertise, we’re unlocking new sources of insurance capital and opening new pathways to markets, delivering differentiated value,” he said.

“Success will increasingly depend on connecting the right capital with the right portfolio. Sidecar X represents the next evolution of that model, enabling insurers to deploy capital with greater confidence while helping clients execute complex transactions with conviction.”

Simon Tesselment, Chief Broking Officer for EMEA at Aon, added: “This evolved platform brings together dedicated capacity with Aon’s global broking expertise to help clients secure coverage more efficiently for the full spectrum of transactions, no matter how large or complex.”